Protestors march through Uptown, the Charlotte the business district, before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The DNC is scheduled to start on Tuesday and run through September 6th. (Photo by Scott Olson/Getty Images)

Photo: Scott Olson, Getty Images

Protestors march through Uptown, the Charlotte the business...

Protestors march through Uptown, the Charlotte the business... Photo-3401777.48386 - SFGate

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Workers stand on stage during preparations for the Democratic National Convention at Time Warner Cable Arena on September 2, 2012 in Charlotte, North Carolina. The DNC that will start on September 4 and run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Kevork Djansezian/Getty Images)

Photo: Kevork Djansezian, Getty Images

Workers stand on stage during preparations for the Democratic...

Workers stand on stage during preparations for the Democratic... Photo-3401805.48386 - SFGate

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Code Pink protesters march in front of the NASCAR Hall of Fame before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The Democratic National Convention is scheduled to start on Tuesday and run through September 6th. (Photo by Tom Pennington/Getty Images)

Photo: Tom Pennington, Getty Images

Code Pink protesters march in front of the NASCAR Hall of Fame...

Code Pink protesters march in front of the NASCAR Hall of Fame... Photo-3401753.48386 - SFGate

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Protesters march with a drone-effigy past Duke Energy headquarters in Uptown, the Charlotte business district, before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The Democratic National Convention is scheduled to start on Tuesday and run through September 6. (Photo by Tom Pennington/Getty Images)

Protesters march through Uptown, the Charlotte the business district, before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The Democratic National Convention is scheduled to start on Tuesday and run through September 6. (Photo by Tom Pennington/Getty Images)

Photo: Tom Pennington, Getty Images

Protesters march through Uptown, the Charlotte the business...

Protesters march through Uptown, the Charlotte the business... Photo-3401778.48386 - SFGate

Image 7 of 21

Law enforcement officers keep watch as protesters march through Uptown, the Charlotte the business district, before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The Democratic National Convention is scheduled to start on Tuesday and run through September 6. (Photo by Tom Pennington/Getty Images)

Aydan Redman sits with Elizabeth West while they participate in a protest outside the Bank of America Headquarters before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The DNC is scheduled to start on Tuesday and run through September 6th. (Photo by Scott Olson/Getty Images)

Photo: Scott Olson, Getty Images

Aydan Redman sits with Elizabeth West while they participate in a...

Aydan Redman sits with Elizabeth West while they participate in a... Photo-3401770.48386 - SFGate

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Sound technicians point to different speaker locations during set up prior to the Democratic National Convention in Charlotte, North Carolina, U.S., on Sunday, Sept. 2, 2012. Democrats gathering for their national convention framed this year's election as two competing economic plans rather than a referendum on President Barack Obama. Photographer: David Paul Morris/Bloomberg

Photo: David Paul Morris, Bloomberg

Sound technicians point to different speaker locations during set...

Sound technicians point to different speaker locations during set... Photo-3401769.48386 - SFGate

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San Antonio Mayor Julian Castro (L) stands on stage at the podium with his brother Juan Castro during preparations for the Democratic National Convention at Time Warner Cable Arena on September 2, 2012 in Charlotte, North Carolina. The DNC that will start on September 4 and run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Joe Raedle/Getty Images)

A protester adds signs to a pile in Frazier Park following a march through Uptown, the Charlotte the business district, before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The DNC is scheduled to start on Tuesday and run through September 6th. (Photo by Scott Olson/Getty Images)

Photo: Scott Olson, Getty Images

A protester adds signs to a pile in Frazier Park following a march...

A protester adds signs to a pile in Frazier Park following a march... Photo-3401751.48386 - SFGate

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Code Pink protester Medea Benjamin marches in front of the NASCAR Hall of Fame before the start of the Democratic National Convention (DNC) September 2, 2012 in Charlotte, North Carolina. The Democratic National Convention is scheduled to start on Tuesday and run through September 6th. (Photo by Tom Pennington/Getty Images)

Protesters stand while holding hands during a demonstration in Charlotte, North Carolina, U.S., on Sunday, Sept. 2, 2012. Demonstrators marched through Charlotte's central business district ahead of the Democratic National Convention (DNC) to protest corporate influence on politics. Photographer: Victor J. Blue/Bloomberg

Protesters shout during a demonstration in Charlotte, North Carolina, U.S., on Sunday, Sept. 2, 2012. Demonstrators marched through Charlotte's central business district ahead of the Democratic National Convention (DNC) to protest corporate influence on politics. Photographer: Victor J. Blue/Bloomberg

Dancers with the Grier Heights Steppers march with flags during a protest in Charlotte, North Carolina, U.S., on Sunday, Sept. 2, 2012. Demonstrators marched through Charlotte's central business district ahead of the Democratic National Convention (DNC) to protest corporate influence on politics. Photographer: Victor J. Blue/Bloomberg

Photo: Victor J. Blue, Bloomberg

Dancers with the Grier Heights Steppers march with flags during a...

Dancers with the Grier Heights Steppers march with flags during a... Photo-3401745.48386 - SFGate

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Travelers walk past a sign for the Democratic National Convention (DNC) after arriving at Charlotte Douglas International Airport in Charlotte, North Carolina, U.S., on Friday, Aug. 31, 2012. The Democratic National Convention (DNC) will begin on Sept. 3 and conclude with Barack Obama accepting the democratic nomination for U.S. President on Sept. 6. Photographer: Daniel Acker/Bloomberg

Photo: Daniel Acker, Bloomberg

Travelers walk past a sign for the Democratic National Convention...

Travelers walk past a sign for the Democratic National Convention... Photo-3401743.48386 - SFGate

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A woman organizes seating assignments during preparations for the Democratic National Convention at Time Warner Cable Arena on September 2, 2012 in Charlotte, North Carolina. The DNC that will start on September 4 and run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

A man rides an escalator in EpiCenter across from the Time Warner Cable Arena September 2, 2012 in Charlotte, North Carolina, site of the Democratic National Convention(DNC). Preparations for the 2012 Democratic National Convention have begun around Charlotte where the the party is expected to nominate US President Barack Obama to run for a second term. AFP PHOTO/Brendan SMIALOWSKIBRENDAN SMIALOWSKI/AFP/GettyImages

Photo: Brendan Smialowski, AFP/Getty Images

A man rides an escalator in EpiCenter across from the Time Warner...

A man rides an escalator in EpiCenter across from the Time Warner... Photo-3401800.48386 - SFGate

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People participate in a rehearsal of a roll call vote for the Democratic National Convention at the Time Warner Cable Arena September 2, 2012 in Charlotte, North Carolina, site of the Democratic National Convention(DNC). Preparations for the 2012 Democratic National Convention have begun around Charlotte where the the party is expected to nominate US President Barack Obama to run for a second term. AFP PHOTO/Brendan SMIALOWSKIBRENDAN SMIALOWSKI/AFP/GettyImages

Photo: Brendan Smialowski, AFP/Getty Images

People participate in a rehearsal of a roll call vote for the...

People participate in a rehearsal of a roll call vote for the... Photo-3401799.48386 - SFGate

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Worker Amos Kelso secures a microphone during set up prior to the Democratic National Convention in Charlotte, North Carolina, U.S., on Sunday, Sept. 2, 2012. Democrats gathering for their national convention framed this year's election as two competing economic plans rather than a referendum on President Barack Obama. Photographer: David Paul Morris/Bloomberg *** Local Caption *** Amos Kelso

Photo: David Paul Morris, Bloomberg

Worker Amos Kelso secures a microphone during set up prior to the...

Worker Amos Kelso secures a microphone during set up prior to the... Photo-3401798.48386 - SFGate